I created this as a way to stop the pencils in my blazer from catching on the stitches of the pocket. The cap slides over the end of the pencil and has a rounded edge to prevent catching. Depending on the tolerances of you printer and the pencil, you may end up with a tighter fit or a looser one. I have printed two so far with both having different fits. These may work on other pencils but I have not tested this. I have included the Fusion project file so you can edit this to your needs. The internal diameter is 7.75mm.